“…The torsion test methods are also proposed in some ASTM standards, but none of them is directly suitable for joined ceramics. 6,7 Results obtained by testing in torsion-joined ceramic cylinders (TC), tubes (TT), and hourglasses (THG) have been recently reported, [8][9][10][11][12][13] discussed and compared with results obtained by testing the same joined ceramics by lap tests and asymmetrical four-point bending test (ASTM C1469-10). As discussed in these references, torsion tests have a potential to evaluate the shear properties of the joint interface, provided that the fracture occurs in the joined area.…”